The river flows in a highly meandering course generally west, and then south by west through the Great Otway National Park and Port Campbell National Park, joined by fourteen tributaries including the Carlisle River, before reaching its river mouth and emptying into the Great Australian Bight, at the locality of Princetown.

From its highest point, the river descends 256 metres (840 ft) over its 94-kilometre (58 mi) course.

[1][2] In 1844 George Allan, a pioneer pastoralist of the Allansford region, recovered what was widely regarded as the remains of Gellibrand near to the river and subsequently named it after him.

[3] This article about a location in Barwon South West (region) is a stub.

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